No prompt at maintenance port (IBM SAN12m1)

I have a second hand IBM Totalstorage SAN12m1/rebadged sphereon 4300). The person I bought it from does not have the IP/Admin login info. So I connected to the system with a DB9 cable and booted it.

I don't get a > prompt to login - below is the output at the maintenance port. Am I simply missing something or if not is there something I can do to try and get a prompt - or do I have a conversation starter?

Port settings are set as desribed in the IBM/brocade service manual for the model.